Sliding sash windows



Oct. 16, 1956 J. DAY ET A1. 2,766,492

SLIDING sAsH WINDOWS l Filed Aug. 24. 1953 35% /3/ /ff i HG '//Wff/To E6 United States Patent Otlice 2,766,492 Patented Oct. 16, 1956 znseaiszy sLIDlNG l`SASH wINDoWs Joseph Day, Seaforth, near Sydney, New South Wales, and Kenneth William George Frederick, Hurstville, near Sydney, New South Wales, Australia Application August 24, 195B, Serial No. 376.',1614 Claims priority, application Australia August 254, 1952 1 Claim. (Cl. 20-52) This invention relates to sliding sash Windows of the double-hung type. The invention has been devised to provide ysuch a window which is assembled without sash frames, which does not require balance Weights.

An advantage resulting from the invention is that is is only necessary to cut the panes to the size of the window frame and provide stile guides, runners and rack toothed bars of the requisite length and a pair of pinions in order to assemble a window.

A window according to the present invention is described with reference to the annexed drawings wherein Fig. l is a `fragmentary perspective view lof a window; Fig. 2 is a section on line 2-2 of Fig. 1; Fig. 3 is a section on line 3-3 of Fig. 2; Fig. 4 is Ia `fragmentary perspective view showing a window pane, a rack bar and its housing and the means for securing a window pane to the housing; Fig. 5 is a fragmentary View of a toothed rack bar showing the joint therein.

The stile guides for each side of a pane are of the same shape and are easily made of metal -or plastic by an extrusion process. Each is made in two parts A and B. Part A consists of a 'base 10 having a stepped inner edge 11 and a central internal projection 12, the edges `of said projection constituting guide edges 13 and 13a. Side 14 extending from the ibase has inwardly projecting runner headings 15. A -front 16 extends Lfrom the side and a pane guide flange 17 extends from Ithe front. The guide ange 17 has an inwardly projecting part 18 constituting a guide which is in the same plane as the guide edge 13. Part B consists of a Ibase 19 the inner part of which registers with the stepped edge 11 `of part A. It also has a part 20 projecting outwardly to take holding screws and its side 21 has runner beadings 22 complementary to the runner headings 15. A front 23 extends from the side and a pane guide ilange 24 extends from the front. This ange 24 has an inwardly projecting part 25 constituting a guide which is in the same plane as the guide edge 13a. Part A is secured to a window frame stile by screws through the central projection 12 and part B is secured by screws through the part 20. When assembled the parts A and B form a box like structure having an opening between the ilanges 17 and 24 to accommodate the window panes. A pinion 26 is mounted on a journal pin Iscrewed into the projection 12 of part A juxtaposed the opening between the anges '17 and 24 and positioned at a central position in the length of each stile guide.

A pair of toothed rack bars 27 are provided for each pane. These bars are conveniently and economically made out of metal or plastic (preferably plastic) by la moulding such as an extrusion process. One method is to extrude the material as a sheet having the rack teeth 28 `formed as longitudinal ribs. Subsequently the sheet is cut into strips to `form the bars. A number of such bars to make the requisite length are joined together with a dovetail joint such as that illustrated at 29 in Fig. 5.

Each rack bar 27 is -xed to the respective sides of a window pane indicated at 30 by top and bottom brackets `31. These brackets have tongues 32 which are bent over the top and bottom edges respectively of the window pane.

In the assembly of the parts a rack b-ar is iixed to each side yof a window pane, the pinions 26 are mounted in the parts A of the stile guides and the top pane mounted in the parts A in engagement with the pinions. Then parts A are xed in the outer position on a window trame stile. The lower pane is then mounted in parts B of the stile guide and parts B vare then xed in the inner position in engagement with parts A.

It will be seen that the rack bars are retained in the stile guides by the guide edges 13-13a and the parts 18 and 25 of the pane guide anges 17 and 24. The runner `headings 1S and 22 hold the rack bars in engagement `with the respective pinions 26 with a minimum of friction. The pane guide anges 17 and 24 -act with the brackets 31 in holding the window panes in position.

The window panes 30 are of such length that when the window is closed the bottom edge of the top pane will overlap the top edge of the bottom pane thus providing a weather seal. The top pane may be of greater length than lthe bottom pane. The parts can be assembled so that if the lbottom pane is moved to the top of the frame there will be an opening between it and the frame while ythe top pane, moved to 4the bottom, registers with the bottom of the trarne.

We claim:

In a sliding sash window, a pair of ystile guides each made in two sections, one section consisting of a base having an Aouter wall, a stepped edge and a central projection providing rack guide edges, inwardly projecting runner beadings on the inner tace of the outer wall, a pane and rack guide flange -on said section a pinion mounted on said central projection; the outer section of said stile guide including, an outer wall, a base with a part adapted to register with said stepped edge and Ian outwardly projecting ilange to take holding screws, inwardly projecting runner headings on the inner face of said last-mentioned outer wall, a pane and rack guide ilange on said last-mentioned section, a pair of window panes mounted in said stile guides, a pair of toothed rack bars for each window pane, each said bar being slidable in said stile guides and tixed to said window panes at the top and bottom by brackets.

References Cited in the le of this patent UNITED STATES PATENTS 630,461 Lloyd Aug. 8, 1899 1,190,682 Strauss July 11, 1916 2,003,723 Rydahl June 4, 1935 2,073,910 Strom Mar. 16, 1937 2,209,293 Cannon et al July 23, 1940 2,238,537 Miller Apr. 15, 1941 

